Oberon class submarine

The Oberon-class submarines were a 40-boat class of British-built diesel-electric submarines based on the successful British Porpoise-class submarines. Eighteen were constructed for the Royal Navy, while another twenty-two were built and exported to other countries' navies: six to the Royal Australian Navy, seven to the Royal Canadian Navy, five for the Brazilian Navy, and four for the Chilean Navy. The Oberon-class served from the early 1960s to the mid-1990s before being replaced by newer more capable submarines.